Minor c



(No Model.)

M. O. KERBAUGH.

ROOFING FABRIC.

UNITED STATES PATENT MINOR C. KERBAUGH, OF PHILADELPHIA, PENNSYLVANIA,ASSIGNOR TO J. WALTER DOUGLASS, OF S AME'PLAOE.

ROOFING FABRIC.

SPECIFICATION forming part of Letters Patent No. 427,174, dated May 6,1890.

Application filed December 3, 1889- delphia and State of Pennsylvania,have invented a certain new and Improved Roofing Fabric, of which thefollowing is a specifica tion.

My invention relates to the manufacture of a silica-coated roofingfabric provided with a plain-surfaced marginal edge.

Heretofore in the manufacture of roofing fabrics of the various methodsemployed probably the most generally practiced one is that ofcompressing together two or more layers or sheets of tarred paper orfelt with an external lower layer or sheet of burlap and an externalupper layer or surface of sand, or a central sheet of burlap coated onboth sides with tar and having compressed thereto an under sheet orlayer of tarred or untarred felt or paper and an upper sheet of felt orpaper provided with an upper surface or coating of sand or gravel.

The principal object of my invention is t provide a one or more plysilica-coated roofing fabric having a plain-surfaced marginal edge oneither the right or the left side of each sheet and arranged so that theopposing side of a silica-coated sheet may be laid onto the plainsurfaced marginal edge of said coated sheet, and thus form a perfectunion of the one sheet with the other, and soon in regular succession;and, moreover, by laying the several plain-surfaced marginal-edgedcoated sheets in such manner not only a perfectly uniform surface orroof is obtained, but a roof presented which will last a long time, asthe sheets are so united as to secure absolutely water-tight joints andsolid or compact unions of the one sheet with the other incontradistinction to coated sheets without plain-surfaced marginaledges, as heretofore used for roofing purposes, and in which in thelaying of them it has been customary to bring the side edge of one sheetflush with the side edge of the other, and placing a strip of tar-paperfirst beneath the sheets and then running pitch along the crack or spacebetween the two side edges of the sheets; but owing to sud= $erial No.332,372. (No specimens.)

den changes in temperaturethat is, extreme heat or excessive cold-thetar either ran or the sheets gaped, and thus in a short time the roofwas branded as a worthless leaky roof, necessitating its removal and thesubstitution ofanother type or kind of roof therefor.

My invention consists, essentially, in the production of a one or moreply silica-coated roofing fabric provided with a plain-surfaced marginaledge.

The nature of my invention will be more fully understood taken inconnection with the accompanying drawings, forming part hereof, and inWhich Figure 1 is a perspective view of a roll, partially opened out, ofa two-ply silica-coated roofing fabric provided with a marginal edge andembodying the particular characteristic features of my invention; andFig. 2 is a similar view of a three-ply roll of said silica-coatedroofing fabric with a plain-surfaced marginal edge.

Referring to the drawings, a is a sheet or layer of felt or paper coatedor saturated with tar or pitch.

- b is the coating of silica distributed over the upper surface of theone or more sheets or layers of tarred paper or felt adjacent to theplain-surfaced marginal edge 0 on either the right or left side thereof.The silica is preferably of large or coarse grain, distributed over theupper tarred surface while in a heated condition in any convenientmanner.

In Fig. 2 is illustrated a three-ply fabric having the upper surfacecoated with silica adjacent or contiguous to the marginal edge 0thereof.

The mode of making a roofing fabric embodying the particular features ofmy invention is as follows: The two or more sheets or layers of felt orpaper are coated with hot tar or pitch in order to permit, preferably,the same to permeate or saturate the body of the sheets or layers offelt or paper, and while her or apartment the tar coated and saturatedsheets or layers are conducted along a traveler or apron in anypreferred manner, and while maintained in said heated condition thesilica is distributed over the surface of the maintained in a heatedcondition in a chamup for use.

The particular features of novelty and advantages incident to the use ofa sheet of I roofing fabric with a plain-surfaced marginal edge is thatthe sheets may be readily united with one another by allowing the bottomof the coated side of one sheet to lap onto the plain-surfaced marginaledge of the other coated sheet, which not only insures a tight joint,but a most efficient union of the one sheet with the other, whereby aperfectly smooth and uniform roof is presented throughout. Furthermore,a roof so formed is less expensive, both as to time and labor, owing tothe fact that the sheets are prepared beforehand and supplied for theirintended purposes.

Having thus described the nature and objects of my invention,what Iclaim as new, and desire to secure by Letters Patent, is

1. As a new article of manufacture, a roofing fabric composed of one ormore tar or silica coated sheets of felt or paper having a strip alongthe edge thereof free from tar or other material, substantially as an dfor the purposes set forth.

2. As a new article of manufacture, a roofing fabric composed of two ormore united tar coated and saturated sheets of felt or paper with silicadistributed over and embedded in the upper surface and a strip along theedge of the fabric free from tar or other material, substantially as andfor the purposes set forth.

In witness whereof I have hereunto set my signature in the presence oftwo subscribing witnesses.

MINOR O. KERBAUGH.

Witnesses:

GEo. W. REED, THoMAs M. SMITH.

